/Engine/Plugins/Importers/USDImporter/Source/USDClasses/Public/USDAssetCache2.h
Usage:FUsdScopedAssetCacheReferencerScopedReferencer{ StageActor->UsdAssetCache, StageActor }; StageActor->SetRootLayer(MyRootLayer); // Adds assets to the cache
struct FUsdScopedAssetCacheReferencer